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The Potential-E85-Conversion-On-An-Internally-Stock Rb25 Thread

islade

By islade,
in Engines & Forced Induction

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NYTSKY Grand Master

NYTSKY

Posted
Posted

I use a Magnafuel washable filter. Methanol/Ethanon compatible.

I tested the local Caltex last week and can confirm they are still supplying E75. Hence im sticking with the United stuff (E90).

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Rolls Grand Master

Rolls

Posted
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How easy is it to retune for a massive change eg E70 to E90, can you just do a rough across the board adjustment and accept it will be good enough, or does it really need to go on the dyno?

scotty nm35 Grand Master

scotty nm35

Posted
Posted

How easy is it to retune for a massive change eg E70 to E90, can you just do a rough across the board adjustment and accept it will be good enough, or does it really need to go on the dyno?

I didn't find the change that severe although I only changed from the Southland Manildra e85, 1 afr on the wideband richer. I guess you could fiddle with injector size if you have a wideband, just run it a little rich just in case.

I did find extra power though when I tuned for Eflex, just wondering if the ethanol needs a little petrol kick to get it firing quicker in the chamber. As Trent has said, its like C16 straight from the pump, at $1L.

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islade Rising Star

islade

Posted
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I recently got my car tuned by Gavin Wood

RB25 with GT3076 0.82 external 50mm gate.

Gav said he couldn't get more than 250kw at 1.1bar out of it safely. When I asked why, he said it's probably just because it's an older worn engine with alot of carbon buildup.

If I was to grab some big injectors and swap to E85, would that overcome this problem to a certain extent, and allow me to run more boost/timing to get more power out of the car, or would that just be asking for trouble?

Thanks guys!

scotty nm35 Grand Master

scotty nm35

Posted
Posted

I recently got my car tuned by Gavin Wood

RB25 with GT3076 0.82 external 50mm gate.

Gav said he couldn't get more than 250kw at 1.1bar out of it safely. When I asked why, he said it's probably just because it's an older worn engine with alot of carbon buildup.

If I was to grab some big injectors and swap to E85, would that overcome this problem to a certain extent, and allow me to run more boost/timing to get more power out of the car, or would that just be asking for trouble?

Thanks guys!

It would only be asking for trouble if you upped the boost a heap, just filling with e85 and remapping the fuel would make the tune much safer as there is no chance of detonation, and the 30% extra fuel volume will cool the pistons more. I don't see a down side at all other than finding a local servo. Dual map it though if you can, just as a backup.

Lithium Grand Master

Lithium

Posted
Posted

Gav said he couldn't get more than 250kw at 1.1bar out of it safely. When I asked why, he said it's probably just because it's an older worn engine with alot of carbon buildup.

How old is old?? Mine is almost 200,000km and at 1.2bar it goes quite chirpily :)

islade Rising Star

islade

Posted
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1993 GTST... No idea what real K's are but i'm guessing they are probably around that... I think he said adding more timing didn't seem to make a difference so there was no point?

What sorta power are you getting at 1.2bar?

34GeeTeeTee Grand Master

34GeeTeeTee

Posted
Posted (edited)

POST FAIL.... Sorry guys, copy and paste went wrong!!!!!!!!!!!

Edited by 34GeeTeeTee
joeyjoejoejuniorshabadoo Grand Master

joeyjoejoejuniorshabadoo

Posted
Posted

250rwkw is not too far off for 1.1 bar...

from memory I had ~250 @ 1 bar with the 2835... but i never EVER ran 1 bar

shove 1.3 bar into it and you should see a substantial gain.

did gav try to add more boost, or just more timing @ 1.1 bar?

SimonR32 Grand Master

SimonR32

Posted
Posted

250rwkw is not too far off for 1.1 bar...

from memory I had ~250 @ 1 bar with the 2835... but i never EVER ran 1 bar

shove 1.3 bar into it and you should see a substantial gain.

did gav try to add more boost, or just more timing @ 1.1 bar?

Listen to this man!

Trozzle Grand Master

Trozzle

Posted
Posted

God damnit I want to get tuned for E85 now!!!! I'm running a pissy 17psi (dropping to 16) on 98 :( I'd love to up it to 19psi on e85....stop bumping these damned threads! you're giving me bad ideas

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